Income Taxes (Tax carry forwards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Tax Credit Carryforward [Line Items]
Research and development credits	$ 2,809,000	$ 2,637,000
Deferred tax assets decrease	200,000	1,500,000
Federal | Federal R&D tax credits carryforwards [Member]
Tax Credit Carryforward [Line Items]
Research and development credits	1,700,000
State | State R&D tax credits carryforwards [Member]
Tax Credit Carryforward [Line Items]
Research and development credits	$ 2,500,000